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Why do I receive License Manager Error -5 when using redundant servers?

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When launching toolboxes and using Redundant Servers, why do I see License Manager Error -5?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 10 Apr 2024
Edited: MathWorks Support Team on 10 Apr 2024
This can occur from 2 things:
  • When the environment variable for the client is configured incorrectly. When the license search path contains one of the three servers of the triad instead of all three, MATLAB will start successfully. However, whenever a toolbox is checked out a License Manager Error -5 is received. To resolve this, correct the environment variable to include every server in the triad. Make sure each server in the environment variable is separated with a colon (,) and not a semicolon (;). Using a semicolon will not work.
  • The license.dat used by the triad is misconfigured. If you are using the word VENDOR instead of DAEMON to refer to the vendor daemon MLM, then you must change it to read as DAEMON instead of VENDOR.

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